This is what we see when clicking on Delete for a user in the admin area.
Important caveat: we only use Delete for new or recent sign-ups when the user starts spamming the forum or adding content that violates our Code of Conduct.
In all other cases, we Anonymize if relevant.
In other words, we only want the Delete Only button.
Next question, which is related: we can manually add an IP to the Screened IPs section but not for Screened Emails:
I don’t think there’s a setting to remove the ‘delete and block’ button, but you should be able to hide it with a little CSS in a custom theme component.
It is quite a useful button though, especially if you only delete spammers. Often they’ll just re-signup if the email and IP aren’t blocked.
I’m afraid there still isn’t a way to manually add an email to the blocked list in the UI (There is a workaround using the rails console, How do I manually add an email address to the block list?, but that’s not particularly useful for day to day use). I did think there was a Feature request for it but I can’t seem to find it.